package com.atguigu.lease.web.admin.interceptors;


import com.atguigu.lease.common.context.LoginUser;
import com.atguigu.lease.common.context.LoginUserContext;
import com.atguigu.lease.common.exceptionhandler.BusException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

@Component
public class AuthenticationAdminInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String token = request.getHeader("access_token");
        if(token == null){
            throw new BusException(ResultCodeEnum.ADMIN_LOGIN_AUTH);
        }else{
            Claims claims = JwtUtil.parseToken(token);
            Long userId = claims.get("userId", Long.class);
            String userName = claims.get("userName", String.class);
//            解析出来的数据后期再接口当中要使用，那么我们就应该把这个数据放到这个线程当中所有的方法都能找到的地方，最好的就是ThreadLocal
            LoginUser loginUser = new LoginUser();
            loginUser.setUserId(userId);
            loginUser.setUserName(userName);
//            把解析出来的数据放到ThreadLocal当中，后续的接口当中都能使用到这个数据
            LoginUserContext.setContext(loginUser);
            return true;
        }
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
//        善后处理  ThreadLocal的清理操作
        LoginUserContext.clearContext();
    }
}
